Definition of "quarterfinal" []

• Of or relating to one of four competitions in a tournament, whose winners go on to play in semifinal competitions. (adjective)
• A quarterfinal round. (noun)
• A quarterfinal match. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""It's been surprise and excitement that Serena and Venus won the first and third major of the year, but disappointment they weren't able to play more and gotten their ranking up to play these matches later," says CBS analyst Mary Joe Fernandez, referring to the Serena-Henin quarterfinal and Venus-Henin semifinal."
• "The 500 will be decided Saturday in quarterfinal through final races."
• "The top-seeded Bruins routed Oregon State 79-47 and the fourth-seeded Wildcats topped Stanford 73-68 in quarterfinal action Thursday afternoon."